Update compare_time.c

datetime/compare_time.c

@@ -3,49 +3,45 @@
 
 int wmain(void) {
 
-    SYSTEMTIME st1 = {0};
-    SYSTEMTIME st2 = {0};
-    FILETIME ft1 = {0};
-    FILETIME ft2 = {0};
-
-    st1.wYear = 2015;
-    st1.wMonth = 4;
-    st1.wDay = 12;
-
-    st2.wYear = 2015;
-    st2.wMonth = 5;
-    st2.wDay = 12;
-
-    int r1 = SystemTimeToFileTime(&st1, &ft1);
-
-    if (r1 == 0) {
-
-        wprintf(L"Failed to convert system time to file time\n (%d)", 
+    PDWORD cChars = NULL;
+    HANDLE std = GetStdHandle(STD_OUTPUT_HANDLE);   
+    
+    if (std == INVALID_HANDLE_VALUE) {
+        wprintf(L"Cannot retrieve standard output handle %d\n", 
             GetLastError());
         return 1;
     }
-  
-    int r2 = SystemTimeToFileTime(&st2, &ft2);
-
-    if (r2 == 0) {
-
-        wprintf(L"Failed to convert system time to file time\n (%d)", 
+ 
+    SYSTEMTIME lt = {0};
+    GetLocalTime(&lt);
+     
+    wchar_t buf[128] = {0};
+     
+    int r = GetDateFormatEx(LOCALE_NAME_USER_DEFAULT, DATE_LONGDATE, 
+                &lt, NULL, buf, sizeof(buf)/sizeof(buf[0]), NULL);
+
+    if (r == 0) {
+    
+        wprintf(L"GetDateFormatEx function failed %d\n", 
             GetLastError());
+            
+        CloseHandle(std);
+        
         return 1;
     }
-    
-    short ct = CompareFileTime(&ft1, &ft2);
-
-    if (ct == -1) {
-
-        wprintf(L"4/12/2015 comes before 5/12/2015\n");
-    } else if (ct == 0) {
 
-        wprintf(L"4/12/2015 is equal to 5/12/2015\n");
-    } else if (ct == 1) {
+    WriteConsoleW(std, buf, wcslen(buf), cChars, NULL);
+    
+    r = CloseHandle(std);
 
-        wprintf(L"4/12/2015 comes after 5/12/2015\n");
+    if (r == 0) {
+    
+        wprintf(L"Cannot close console handle %d\n", 
+            GetLastError());
+        return 1;    
     }
+    
+    CloseHandle(std);
 
     return 0;
 }